func AddConfigFlag(fs *pflag.FlagSet, cfgPath *string) {
	fs.StringVar(cfgPath, CfgPath, *cfgPath, "Path to a kubeadm configuration file.")
}

// AddIgnorePreflightErrorsFlag adds the --ignore-preflight-errors flag to the given flagset
func AddIgnorePreflightErrorsFlag(fs *pflag.FlagSet, ignorePreflightErrors *[]string) {
	fs.StringSliceVar(
		ignorePreflightErrors, IgnorePreflightErrors, *ignorePreflightErrors,

	cmdutil "k8s.io/kubernetes/cmd/kubeadm/app/cmd/util"
	"k8s.io/kubernetes/cmd/kubeadm/app/features"
	"k8s.io/kubernetes/cmd/kubeadm/app/phases/upgrade"
	"k8s.io/kubernetes/cmd/kubeadm/app/preflight"
	kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
	"k8s.io/kubernetes/cmd/kubeadm/app/util/apiclient"
	configutil "k8s.io/kubernetes/cmd/kubeadm/app/util/config"
	"k8s.io/kubernetes/cmd/kubeadm/app/util/output"
)

		if err := migrateCoreDNSCorefile(client, coreDNSConfigMap, corefile, currentInstalledCoreDNSVersion); err != nil {
			// Errors in Corefile Migration is verified during preflight checks. This part will be executed when a user has chosen
			// to ignore preflight check errors.
			canMigrateCorefile = false
			klog.Warningf("the CoreDNS Configuration was not migrated: %v. The existing CoreDNS Corefile configuration has been retained.", err)

		{[]string{"--foo=bar"}, true},
		{[]string{"--config=hello"}, true},
		{[]string{"--config=hello", "--ignore-preflight-errors=all"}, true},
		// Expected to succeed, --config is mixed with skip-* flags only or no other flags
		{[]string{"--config=hello", "--skip-token-print=true"}, true},
		{[]string{"--config=hello", "--ignore-preflight-errors=baz", "--skip-token-print"}, true},
		// Expected to fail, --config is mixed with the --foo flag

	return d.client
}

// PatchesDir returns the folder where patches for components are stored
func (d *nodeData) PatchesDir() string {
	return d.patchesDir
}

// IgnorePreflightErrors returns the list of preflight errors to ignore.
func (d *nodeData) IgnorePreflightErrors() sets.Set[string] {
	return d.ignorePreflightErrors
}

// KubeConfigPath returns the path to the user kubeconfig file.

		}
	}

	return allErrs
}

// ValidateIgnorePreflightErrors validates duplicates in:
// - ignore-preflight-errors flag and
// - ignorePreflightErrors field in {Init,Join}Configuration files.
func ValidateIgnorePreflightErrors(ignorePreflightErrorsFromCLI, ignorePreflightErrorsFromConfigFile []string) (sets.Set[string], error) {

- Kubeadm: during the preflight check "CreateJob" of "kubeadm upgrade", check if there are no nodes where a Pod can schedule. If there are none, show a warning and skip this preflight check. This can happen in single node clusters where the only node was drained. ([#124503](https://github.com/kubernetes/kubernetes/pull/124503), [@neolit123](https://gi...

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package preflight

import (
	"bytes"
	"fmt"
	"net"
	"net/http"
	"os"
	"runtime"
	"strings"
	"testing"

	utiltesting "k8s.io/client-go/util/testing"

	"github.com/google/go-cmp/cmp"

                      properties:
                        allowCredentials:
                          description: Indicates whether the caller is allowed to
                            send the actual request (not the preflight) using credentials.
                          nullable: true
                          type: boolean
                        allowHeaders:
                          description: List of HTTP headers that can be used when

                      properties:
                        allowCredentials:
                          description: Indicates whether the caller is allowed to
                            send the actual request (not the preflight) using credentials.
                          nullable: true
                          type: boolean
                        allowHeaders:
                          description: List of HTTP headers that can be used when